Oil pump and filter



June 16, 1942. F. F. KlsHLlNE 2,286,816

OIL PUMP AND FILTER Filed Aug. 8, 1940 INVENTOR. FLOYD K/JHL//VE BY I E @5% ATTORNEY. l

Patented June 16, 1942 l i 2,286,816 OIL `PUMP AND FILTER Floyd F. Kishline, Kenosha, Wis., assigner to Nash-Kelvinator Corporation, Kenosha, Wis., a corporation of Maryland Application August 8,1940, Serial No. 351,855

Claims.

It is another object of this invention vto pro -L vide an oil pump which is designed to receive an oil filter thereon, which is accessible from below the pump.

It is another object of this invention to provide means for bleeding a portion of the output of an oil pump directly from the pump to a lter and returning the filtered oil tothe intake side g of said pump.

Other objects and advantages of the invention will be apparent from a consideration of the following description and claims and the attached drawing of which there is one sheet and in which Figure 1 represents a vertical transverse section, partially broken away, through an internal combustion engine;

Figure 2 represents a section taken along a` plane lindicated by the line 24-2 in Figure 1 and looking in the direction of the arrows;

Figure 3 represents a section taken along a plane indicated by the line 3-3 in Figure 2 and looking in the direction of the arrows;

Figure 4 represents a bottom plan view of the gasket which ts between the engine and oil pump.

Attention is of the section of Figure I--I in Figure 2.

Shown in Figure 1 is a portion of an internal combustion engine indicated generally at I0 and having a cylinder I2 surrounded by a cooling water jacket I4. Extending from one side of the* cylinder I2 is va generally horizontal wall I6 in which are formed bosses I8 which are apertured called to the fact that the plane 1 is indicated by the line at to form guides for valve push rods (not shown). Below the cylinders I2 andv horizontal wall I6 are formed the walls 22 of the crank case 24 of the engine which are cast along with the block. One of the walls 22 is thickened as at 26 for apurpose which will be described later. The other wall- 22 (the left wall as viewed in Figure 1) is provided with a boss 28 apertured lat 30 to receive the end of a distributor 32 and pass the distributor shaft 34. The boss 28 and shaft 34 are located forwardly'of the section line at which Figure 1 is taken.

The thickened portion of the right wall 22 (see 55 Figures l and 3) is machined into a sloping surface 36 to whichv the oil pump, generally indicated at 38, is secured by means of screws 40. The sloping surface 36 is normal to the distributor shaft 34 and is provided with two holes 44 and 45 which extend upwardly andvparallel to the distributor shaft 34. The upper hole 44 connects with a hole 46 leading to an oil manifold or header 48 for delivering oil to the various parts of the engine. The lower hole connects with a. downwardly opening hole 50 which forms thesuction line of the pump 38. Secured in the lower end of hole 50 is a tube 52 which extends downwardly to a screened intake (not shown) in the oil pan 54.

The oil pump 38 consists of a casting having a base 56 from which extends the cylindrical boss 58 (see Figure 3). The boss 58 fits into a hole 60 formed in the thickened portion 26 of the crank case wall 22, forwardly of the holes 44 and 45. The boss 58`eis bored to receive the shaft 62 which drives the pump 38. Below the base 56 the casting is b ored in two parallel intersecting cylinders 64 and 66 within which t the mating gears 68 and 1I). The casting is cut away at 'l2 where the two cylindrical spaces intersect to form f charge chamber 12 and the lower hole 45 connects with a hole 19 in the base 56 which opens into the pocket 'I6 inthe end of the intake chamber 14.

The gear 'l0 is retained on the lower end of shaft 62 by means of a snap ring T8 fitted in a 1 groove in the end of the shaft 62 see Figure 3) 'and is fixed to rotate with the shaft by a key 80 engaged in the /keyway 82 cut in the gear 10. The gear 68 is driven by the geal` I0 and turns on an id1er,shaft 84 see Figure 2) fixedin the base 56 ofthe pump casting. l

The upper vend of the shaft 62 carries the gear 86 which is fixed on the shaft by means of the pin 88. The hub of gear 86 bears on the upper surface of the cylindrical boss 58 and keeps/thev shaft 62 from sliding lengthwise of the'bore 60.

The gear 86 mates with a'spiral gear 90 cut iny the cam shaft 92 so that theA o il pump is driven,v

by the cam shaft.

The distributor shaft 34 is slotted at its lower A* end at 94 and fits within the gear-"86 ywhere the upper endof the pump shaft 62 is provided with a tongue 9 6 whichts into the slot 94 and driv`es the distributor shaft 34.

A gasket lS18-is positioned between the sloping surface 36 on the engine 'and the b`ase 56 .of the pump ,38. fGasket-iii (see Figure 4) has formed therein holes |00 which pass the screws 40 and the hole |02 which passes the cylindrical boss 58 of the pump 38. -Hole |04 permitsoil flow between the intake chamber and the lower passage 45 inthe engineblock, and'hole |06 allows communication between the discharge chamber l'l2 and the upper passage y"44 `in the engine block. It will be noted that a smallslot |08 is cut in the gasket 98 between Ythe holes |06 and |02. When the gasket is in place between the pump and motor block, the slot- |08 forms a metering passage through which oil is bled from the discharge passage 44 to the annular `space l -formed by reducing the diameter of the cylindrical boss 58 at ||,2. .'From the annular space l| I0 oil flows through a hole ||4 in the boss 58 -to a second annular -space ||6 formed by reducing the diameter of the shaft 62 at H8. 'Oil from the annular space ||6 creeps as a relief hole to return a portion of the oil in the annular space 6 to the oil pan 54. Gears 86 and 90 are thus positively lubricated at every revolution of the shaft 62. l

The lower face of the pump 38 is machined Y iiat at and is closed by the head `|32 of an-oil iilter |34 which is secured to the pump 38 by the screws 40.V Head |32 has al raised Yportion |35 formed on a circular cap |36.

Raised portion |35 is machinedk iiat to form the inclined'face |38 which fits against the lower face |30 of the pump 38 and is provided with the passages |40 and |42. 'Passage |42 opens at its upper end into the discharge chamber 12 of the pump, and passage |40 opens into the intake chamber 1 4. The face |38 is cut away around each passage |40 and |42to form pockets |44 similar to pockets 16 at the upper ends of the discharge and intake chambers 12 and 14 of the pump. The face |38 may also be recessed to accommodate the lower end of the shaft 62.

Formed on the bottom of cap |36 is an annular groove |46 and a hollow boss |46 in the center thereof. threaded at |50 and communicates with the passage |42 fromthe discharge chamber 12 of the pump 38. Groove |46 is arranged to receive the |60 outside of the container |52 which seals the` lower end of the container bydrawing up on a gasket |6.| when theplug |58 and pipe |56 are 'along the shaft *V62 to lubricate the -shat and Hollow boss |48 is internally turned into the hollowlboss |48. Turning up the plug |58 and pipe |56 also tightens the container |52 into the annular groove |46 sealing the top of the container. Plug |58 is retained in the container |52 by a snap ring |62.

Cartridge |54v is smaller than thev container l|52 so that oil entering pipe |56 will passthrough lholes |64 in the center of the pipe, through the filtering material of the cartridge and up 'the annular space |66 betweenV the cartridge and container to the passage |40 which is connected to the intake or suction side of the pump 38.

The hollow plug |58 is provided, below the pipe |56, with a spring-pressed` relief valve |68 which' `|42. Hole |14 acts as a metering device so that y only `part of th'e oil discharged by the pump passes through the filter. Y

By use of this invention the raised portion |35 of the filter cap |32 takes the place of the oil pump cover. No extra tubing is Vnecessary over that required vby an engine without a filter, and the labor of drilling holes for the tubing is dispensed with. There are less connections which might rattle loose and leak. The filter may be assembled on newV cars or added to cars already in use with a minimum of labor. Thelter may also be serviced while the car is raised on a grease rack without lowering the car or opening the hood'.

While I have described my invention in some detail, I intend this description to be an example only and not limiting of my invention to which lI make the following claims.

I claim: 1. In combination with`an oil pump having vintake and discharge chambers, intake and discharge passageways,communicating with sai'dV charge passageways communicating with said chambers, a cover for said pump defining ports communicating with said chambers, filter means secured to said cover and communicating with said ports, and metering means positioned in one of said ports.

3. In combination with a rotaryV oil pump having intake and discharge chambers, said pump defining intake and discharge passages, a cover for said pump deiining other passages communieating with sai chambers, and filter means secured to said cover and communicating with said other passages, said pump and said lter means being separably removable from saisi cover.

4. In combination with a motor having a rotary oil pump :secured Von the outside thereof and having intake and discharge chambers, intake and discharge passageways communicating with said chambers, a cover for said pump denning ports communicating with said'ch'ambers, and

filter means secured Ato said cover and come municating with said ports.

5. An oil filter comprising a head having a cap portion and a surface forming a portion of a pumping chamber, said head defining two passages between said surface and said cap portion, a container secured to said cap portion, a filter element positioned within said container, means for directing a flow of oil from onev of said passages through said filter element, said other passage returning filtered oil to said surface, and means for securing said filter to an oil pump with said passages communicating with the pumping chamber,

6. An oil filter comprising a head having an inclined surface forming a part of a pumping chamber and a cap portion, said head defining two passages between said surface and said cap portion, a container secured to said cap portion,

v a filter element positioned with said container,

means for directing a fiow of oil from one of said passages through said'lter element, said other passages returning filtered oil to said surface, and means for securing said surface to an oil pump with said passages communicating with the pumping chamber. v

'7.'In combination with an oil pump, an oil filter comprising a head having a surface forming a portion of a pumping chamber and a cap portion, said head defining two passages between said surface and said cap portion, a container secured to said cap portion, a filter element positioned Within said container, means for directing a fiow of oil from one of said passages through said filter element, said other passage serving as a return for the filtered oil to said pump, and means for securing said filter to said oil pump, said first passage having metering means there- 8. An oil filter comprising a head having a surface forming a portion of a pumping chamber and a cap portion, said head defining two passages between said surface and said cap portion, a container secured to said cap portion, a filter element positioned within said container, means for directing a -fiow of oil from one of said passages through said filter element to the other of said passages, and means for securing said filter to an oil pump.

9. An oil filter comprising a head having a surface forming a portion of a pumping chamsure sides of said pump, a pipe connected to one of said passageways and extending through said filter element, and means threaded on the end of said pipe arranged to secure said'container to said head, said pipe being perforated within said filter element.

11. In combination with a pump having intake and discharge chambers with passages communicating therewith, a cover for said pump defining other passages communicating with said chambers, a container secured to said cover, a filter element in said container, a pipe secured to said cover and communicating 'with one of said other passages, said pipe extending through said filter' element and defining apertures opening into said filterV element, a plug extending through a wall of said container and threaded on the end of .said pipe, said plug being arranged to secure said container to said cover, and a pressure relief valve positioned in said plug and arranged to discharge into said container and outside of said filter element.

12. In combination with a lubricant circulating pump having intake and discharge connections and a filter for lubricantA acted upon by said pump, a cover for said pump having a surface constituting a part of the pumping chamber, and apertures through said cover upon the intake and discharge sides of the pump, said filter being secured against said cover in a position to receive lubricant from the aperture connecting with said discharge side and to returnA the lubricant to the aperture connecting with said intake side of said pump.

13. A lubricant pump comprising pumping instrumentalities, a pumping chamber having an intake and a discharge side and formed by two parallel fiat surfaces and a body portion, dis-V of inlet and discharge apertures serving to conber and a cap portion, said head defining two head for said container secured directly to said pump, a filter element in said container, said head defining passageways communicating with said container and with the high and low pres- .nect said pump to a lubricant filter.

14. A l'ubricantpump comprising a pumping chamber, gears within said chamber arranged to ports communicating therewith to supply lubri-y cant under pressure to said system, additional intake and discharge ports for the pump directly communicating with the intake and discharge sides of the pump, and a lubricant filter operatively connected to said additional ports for circulation of lubricant through said filter.

- FLOYD F. KISHLINE. 

